CN104371795B - Low density foamed concrete product demolding agent and preparation method thereof - Google Patents
Low density foamed concrete product demolding agent and preparation method thereof Download PDFInfo
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- CN104371795B CN104371795B CN201410475705.9A CN201410475705A CN104371795B CN 104371795 B CN104371795 B CN 104371795B CN 201410475705 A CN201410475705 A CN 201410475705A CN 104371795 B CN104371795 B CN 104371795B
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Abstract
The invention relates to a low density foamed concrete product demolding agent and a preparation method thereof, wherein the low density foamed concrete product demolding agent is prepared from a liquid paraffin, a non-alkali metal stearate and a thickener, and the preparation method comprises: mixing the liquid paraffin and the thickener, heating to form a uniform system, and stirring while adding the non-alkali metal stearate in batches to exhaust air in the system so as to prepare the product. According to the present invention, the product is easy to brush and can completely meet the forming production of the foamed concrete product having the bulk density of 200 kg/m<3> and below, sticking on the mold is not produced completely after the use so as to substantially reduce the cleaning workload of the steel grinding tool, and the product surface contacting the grinding tool can have the good bonding capacity with the cement mortar without the additional special treatment.
Description
Technical field
The invention belongs to the concrete parting agent that building field is used, specifically a kind of low density foam concrete system
Product releasing agent and preparation method thereof.
Background technology
Concrete product variety of release agents is various, substantially can be divided into oiliness and aqueouss two class.Aqueous release agent, produces into
This is low, for plastics, rubber, plank class mould, proper, but for steel die, mould corrosion is inevitable.Steel
Molding jig, easy processing, intensity are big, are unlikely to deform, high temperature resistant, ageing-resistant, if using oil-based release agent, can greatly extend it
Service life.
Compared with normal concrete, foam concrete reduces rapidly with the reduction of unit weight, intensity, particularly when unit weight drops
To 200kg/m3When, its comprcssive strength is about 0.5mpa, pull strength is below 0.10mpa.Under this kind of situation, if still continuing to use general
Logical concrete parting agent, then either oiliness or aqueouss, all there is different degrees of mold sticking unavoidably.Its reason exists
In: aqueous release agent inevitably must use water soluble surfactant active, in foam concrete slurry casting process, water
Soluble surfactants can enter foam concrete slurry certain depth, thus affecting the surface strength of product；Plant oiliness takes off
Mould agent runs into, in alkaline cement slurry, a certain degree of saponification must occur, particularly under making condition, saponification depth
Higher, the glycerol that saponification produces also can affect product surface intensity；Machine oil class oil-based release agent, not only price, and wherein
Some additives (such as anti-wear agent, antioxidant) equally can affect product surface intensity.This not only makes product appearance not good,
Also it is substantially increased the workload of mold cleaning.
Content of the invention
It is applied to that product appearance after the demoulding existing during the foam concrete demoulding is good, mould for solving existing releasing agent
The problems such as cleaning difficulty is big, the invention provides a kind of low density foam concrete product releasing agent and preparation method thereof, uses
After the product of the present invention, foam concrete slurry through cast, standing, 90～100 DEG C steam-cured after, not sticking to mould completely, significantly
Improve the exterior quality of concrete product, also reduce the cleaning difficulty of mould simultaneously.
The present invention is that the technical scheme solving above-mentioned technical problem employing is: a kind of low density foam concrete product demoulding
Agent, according to percentage by weight, by the liquid paraffin of 60-80%, the non-alkali metal stearate of 12-24% and the thickening agent of 8-16%
Make, wherein, described non-alkali metal stearate is calcium, magnesium, zinc, barium and aluminum one or more of stearate, thickening
Agent is hard paraffin, Pulvis Talci, precipitated calcium carbonate and sepiolite powder one or more of.
The preparation method of above-mentioned low density foam concrete product releasing agent, adds after first liquid paraffin being mixed with thickening agent
Heat, is allowed to be formed uniform system, and the stirring of another side adds non-alkali metal stearate, in batches with exclusion system
Air is obtained product.
The action principle of the present invention is: 1. all the components are all particularly stable, and water insoluble；2. in thickener component,
Hard paraffin itself is hydrophobic, and the inorganic particulate material such as Pulvis Talci surface, after being adsorbed by liquid paraffin saturation, equally hydrophobic；
3. non-alkali metal stearate has certain dissolubility in liquid paraffin, and under conditions of heating, it can be divided with molecularity
It is distributed between liquid paraffin and hard paraffin molecule, or be coated in the inorganic particulate material such as Pulvis Talci surface；4. by 1., 2., 3.
It can be deduced that after the releasing agent of the present invention is brushed firm grinding tool inwall, non-alkali metal stearate is as a kind of ionizing
Electrostatic force is certainly existed, i.e. its metal ion and carboxyl between compound, and metal surface or the oxide of metal surface
Will be close to steel grinding tool side, and its alkyl, then towards releasing agent side, so that releasing agent is easy to brush, but simultaneously as takes off
The restriction effect of the thickening agent in mould agent, this align and is very limited；5. when releasing agent contact foam concrete slurry
After material, equally only have the stearic acid molecule that some are still in free state and realize aligning, that is, hydrophobic group is towards releasing agent
Side, hydrophilic group is towards foam concrete slurry side.
Beneficial effect: it is convenient that the product of the present invention is brushed, and can adapt to unit weight completely in 200kg/m3And its following bubble
The molding of foam concrete product produces, and using rear not sticking to mould completely, greatly reduces the cleaning work amount of steel grinding tool, meanwhile,
In addition the surface of product into contact grinding tool special handling just need not can have good cementability with cement mortar.
Specific embodiment
With reference to specific embodiment, the present invention is further elaborated.
Embodiment 1
Formula 1(gross mass 100kg):
Liquid paraffin 80kg
Non-alkali metal stearate 12kg
Hard paraffin (thickening agent) 8kg
Preparation method:
It is mixed and heated, stirs added together to liquid paraffin and hard paraffin first, making formation homogeneous system, for preventing
Excessive pot, will stir addition stearate in batches, the air in exclusion system.
This kind of releasing agent, the new steel plate using for first time is especially suitable, and hard paraffin can be set in steel grinding tool
Smear surface and do not come off easily, thus protecting steel mold not corroded by foam concrete slurry.
Embodiment 2
Formula 2(gross mass 100kg):
Liquid paraffin 70kg
Non-alkali metal stearate 18kg
Precipitated calcium carbonate (thickening agent) 12kg
Preparation method: except hard paraffin is replaced by precipitated calcium carbonate, and adjust outside corresponding proportion, remaining and embodiment 1 phase
With.
The great advantage of this kind of releasing agent is low price, but continuously uses 10 times about, it is preferred to use the product of embodiment 1
Product smear steel mold once, thus protecting steel mold not corroded by foam concrete slurry.
Embodiment 3
Formula 3(gross mass 100kg):
Liquid paraffin 60kg
Non-alkali metal stearate 24kg
Pulvis Talci (thickening agent) 16kg
Preparation method: except hard paraffin is replaced by Pulvis Talci, and adjust outside corresponding proportion, remaining is same as Example 1.
The present embodiment product, during for ambient temperature >=28 DEG C, is relatively suitable for, reduces with ambient temperature, releasing agent sticks
Degree increases, and coating thick not only wastes but also operates inconvenience.
Using method is same as Example 2.
Embodiment 4
Formula 4(gross mass 100kg):
Liquid paraffin 75kg
Non-alkali metal stearate 15kg
Sepiolite powder (by 60 mesh sieves, thickening agent) 10kg
Preparation method: first added together to liquid paraffin and sepiolite powder and high shear force stirring are mixed, make the sea of fasciculation
Afrodite fiber is dissociated into ultimate fibre one by one, then under heating, stirring, adds stearate in batches, mix homogeneously is
Can.
The thickening agent raw material sepiolite powder of the present embodiment product is the leftover bits and pieces generating sepiolite fibre, thus price is relatively
Low, and using effect is better than thickening agent raw material precipitated calcium carbonate.
Using method is same as Example 2.
Embodiment 5
Formula 5(gross mass 100kg):
Liquid paraffin 75kg
Non-alkali metal stearate 15kg
Sepiolite powder (by 60 mesh sieves, thickening agent) 7kg
Hard paraffin (thickening agent) 3kg
Preparation method: first added together to liquid paraffin and sepiolite powder and high shear force stirring are mixed, make the sea of fasciculation
Afrodite fiber is dissociated into ultimate fibre one by one, then under heating, stirring, adds hard paraffin, when hard paraffin is completely molten
Xie Hou, adds stearate, mix homogeneously in batches.
The thickening agent raw material sepiolite powder of the present embodiment product however, it would be possible to be replaced by Pulvis Talci or precipitated calcium carbonate,
Or combinations thereof, using effect and method same as Example 1, but price is relatively low.
Condition of the present invention is more relaxed, and described embodiment is only that the explanation present invention it is impossible to be used as restrictive condition.Product is not
It is suitable only for low unit weight cellular concrete product to produce, be also fully able to adapt to the production of high-quality normal concrete product.
Claims (2)
1. a kind of low density foam concrete product releasing agent it is characterised in that: according to percentage by weight, by the liquid of 60-80%
The thickening agent of paraffin, the non-alkali metal stearate of 12-24% and 8-16% is made, and wherein, described non-alkali metal stearate is
Calcium, magnesium, zinc, barium and aluminum one or more of stearate, thickening agent be precipitated calcium carbonate.
2. low density foam concrete product releasing agent according to claim 1 preparation method it is characterised in that: first
Liquid paraffin and thickening agent mixing post-heating, are allowed to be formed uniform system, and the stirring of another side adds non-alkali gold in batches
Belong to stearate, product is obtained with the air in exclusion system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475705.9A CN104371795B (en) | 2014-09-18 | 2014-09-18 | Low density foamed concrete product demolding agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475705.9A CN104371795B (en) | 2014-09-18 | 2014-09-18 | Low density foamed concrete product demolding agent and preparation method thereof |
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| Publication Number | Publication Date |
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| CN104371795A CN104371795A (en) | 2015-02-25 |
| CN104371795B true CN104371795B (en) | 2017-01-18 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107376890A (en) * | 2017-07-29 | 2017-11-24 | 望江县大唐资源再生有限公司 | A kind of dregs of fat cracking method for preparing catalyst |
| CN107362816A (en) * | 2017-07-29 | 2017-11-21 | 望江县大唐资源再生有限公司 | A kind of residual hydrocracking method for preparing catalyst |
| CN109203320A (en) * | 2018-10-27 | 2019-01-15 | 泉州市联控自动化科技有限公司 | A kind of production method of the dedicated paraffin of 3D printer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4028120A (en) * | 1974-12-20 | 1977-06-07 | Exxon Research And Engineering Company | Mold release agent for urethane foamed rubber |
| JPS57155297A (en) * | 1981-03-23 | 1982-09-25 | Naniwa Kasei Kk | Solid lubricant composition |
| CN1138619A (en) * | 1996-02-06 | 1996-12-25 | 刘福祥 | Solid isolation agent |
| CN101880585A (en) * | 2010-04-20 | 2010-11-10 | 中国十七冶集团有限公司 | Waxy separant for precast concrete unit |
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